#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>

int main()
{
	double r, d, s, a;
	scanf("%lf", &r);
	d = 2 * r;
	s = 3.14159 * r * r;
	a = 2 * 3.14159 * r;
	printf("%.4lf %.4lf %.4lf", d, a, s);
	return 0;
}